120 lines
4.4 KiB
C++
120 lines
4.4 KiB
C++
#include "clang/Basic/Attributes.h"
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#include "clang/Basic/AttrSubjectMatchRules.h"
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#include "clang/Basic/AttributeCommonInfo.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "llvm/ADT/StringSwitch.h"
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using namespace clang;
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int clang::hasAttribute(AttrSyntax Syntax, const IdentifierInfo *Scope,
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const IdentifierInfo *Attr, const TargetInfo &Target,
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const LangOptions &LangOpts) {
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StringRef Name = Attr->getName();
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// Normalize the attribute name, __foo__ becomes foo.
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if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
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Name = Name.substr(2, Name.size() - 4);
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// Normalize the scope name, but only for gnu and clang attributes.
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StringRef ScopeName = Scope ? Scope->getName() : "";
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if (ScopeName == "__gnu__")
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ScopeName = "gnu";
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else if (ScopeName == "_Clang")
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ScopeName = "clang";
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#include "clang/Basic/AttrHasAttributeImpl.inc"
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return 0;
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}
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const char *attr::getSubjectMatchRuleSpelling(attr::SubjectMatchRule Rule) {
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switch (Rule) {
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#define ATTR_MATCH_RULE(NAME, SPELLING, IsAbstract) \
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case attr::NAME: \
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return SPELLING;
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#include "clang/Basic/AttrSubMatchRulesList.inc"
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}
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llvm_unreachable("Invalid subject match rule");
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}
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static StringRef
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normalizeAttrScopeName(const IdentifierInfo *Scope,
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AttributeCommonInfo::Syntax SyntaxUsed) {
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if (!Scope)
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return "";
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// Normalize the "__gnu__" scope name to be "gnu" and the "_Clang" scope name
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// to be "clang".
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StringRef ScopeName = Scope->getName();
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if (SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
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SyntaxUsed == AttributeCommonInfo::AS_C2x) {
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if (ScopeName == "__gnu__")
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ScopeName = "gnu";
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else if (ScopeName == "_Clang")
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ScopeName = "clang";
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}
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return ScopeName;
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}
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static StringRef normalizeAttrName(const IdentifierInfo *Name,
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StringRef NormalizedScopeName,
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AttributeCommonInfo::Syntax SyntaxUsed) {
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// Normalize the attribute name, __foo__ becomes foo. This is only allowable
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// for GNU attributes, and attributes using the double square bracket syntax.
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bool ShouldNormalize =
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SyntaxUsed == AttributeCommonInfo::AS_GNU ||
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((SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
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SyntaxUsed == AttributeCommonInfo::AS_C2x) &&
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(NormalizedScopeName.empty() || NormalizedScopeName == "gnu" ||
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NormalizedScopeName == "clang"));
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StringRef AttrName = Name->getName();
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if (ShouldNormalize && AttrName.size() >= 4 && AttrName.startswith("__") &&
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AttrName.endswith("__"))
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AttrName = AttrName.slice(2, AttrName.size() - 2);
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return AttrName;
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}
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bool AttributeCommonInfo::isGNUScope() const {
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return ScopeName && (ScopeName->isStr("gnu") || ScopeName->isStr("__gnu__"));
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}
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#include "clang/Sema/AttrParsedAttrKinds.inc"
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static SmallString<64> normalizeName(const IdentifierInfo *Name,
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const IdentifierInfo *Scope,
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AttributeCommonInfo::Syntax SyntaxUsed) {
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StringRef ScopeName = normalizeAttrScopeName(Scope, SyntaxUsed);
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StringRef AttrName = normalizeAttrName(Name, ScopeName, SyntaxUsed);
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// Ensure that in the case of C++11 attributes, we look for '::foo' if it is
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// unscoped.
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SmallString<64> FullName = ScopeName;
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if (Scope || SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
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SyntaxUsed == AttributeCommonInfo::AS_C2x)
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FullName += "::";
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FullName += AttrName;
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return FullName;
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}
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AttributeCommonInfo::Kind
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AttributeCommonInfo::getParsedKind(const IdentifierInfo *Name,
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const IdentifierInfo *ScopeName,
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Syntax SyntaxUsed) {
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return ::getAttrKind(normalizeName(Name, ScopeName, SyntaxUsed), SyntaxUsed);
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}
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std::string AttributeCommonInfo::getNormalizedFullName() const {
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return static_cast<std::string>(
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normalizeName(getAttrName(), getScopeName(), getSyntax()));
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}
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unsigned AttributeCommonInfo::calculateAttributeSpellingListIndex() const {
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// Both variables will be used in tablegen generated
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// attribute spell list index matching code.
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auto Syntax = static_cast<AttributeCommonInfo::Syntax>(getSyntax());
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StringRef Scope = normalizeAttrScopeName(getScopeName(), Syntax);
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StringRef Name = normalizeAttrName(getAttrName(), Scope, Syntax);
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#include "clang/Sema/AttrSpellingListIndex.inc"
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}
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